Perhaps you should try some spelling variations:
cach thuc » anh thuc
quyen tap » tuyen tap, luyen tap, quyen cap
cac kieu » cach tieu, cac yeu, tac kiem
bang vat » bang va, dang vat, cang vat
cac thu » cac thoi
co bang » cao bang, con bang, co ban
te dung » tieu dung, tien dung, tin dung
vat y » vat ly, vat _

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: quyen tap ((cac kieu) or (((cac thu) OR (cach thuc)))) đe co bang vat y te dung trong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen tap ((cac kieu) OR (((cac thu) OR (cach thuc)))) đe co bang vat y te dung trong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "quyen tap ((cac kieu) or (((cac thu) OR (cach thuc)))) đe co bang vat y te dung trong".
• Adding a wildcard symbol may retrieve word variants: quyen tap ((cac kieu) or (((cac thu) OR (cach thuc)))) đe co bang vat y te dung trong*.